More than 400 years ago, there was a prince in the Ming Dynasty, who wrote to the emperor 7 times to ask that he no longer inherit the throne of Zheng, he only wanted to do learning and devoted himself to academic research, he was the Ming Dynasty phonologist, calendarist, mathematician Zhu Zaiyu. Zhu Zaiyu (1536-1611), a native of Hanoi Province, Huai Khanh Province (present-day Qinyang, Henan), was known as Le sheng. His father was able to write well and was proficient in musical music and music scores, Zhu Zaiyu had heard about it since childhood, liked music and mathematics, and eventually wrote more than a million words of writings on the basis of his predecessors, especially the "Complete Book of Musical Laws", which involved music, astronomy, calendar, mathematics, dance, literature and so on. Zhu Zaiyu is a heavyweight scientist who can be on a par with Li Shizhen, Song Yingxing, Xu Guangqi and Xu Xiake, and is also an encyclopedic scholar, a true world historical and cultural celebrity respected by Chinese and foreign scholars. Zhu Zaiyu created a number of world firsts during the Ming Dynasty, and his most prominent contribution was the twelve-average law, which completely solved the problem of the interval that has plagued people for thousands of years, and is a major event in the history of music. Until now, modern musical instruments have been made using the law of twelve averages to determine the tone.
The Zhu Zaiyu Memorial Hall is located in Qinyang City, and there is an introduction to Zhu Zaiyu's life and writings.
Lesheng Park, 20 kilometers from the city, has the tomb of Zhu Zaiyu, located on the side of the road, with a sign for the tomb of King Zheng.
